Spark-plug



A. MAYER.

' SPARK PLUG. APPL|cAT|oN- msn 1A`N,2s. 1918.

Patented July 1, 1919.

wilhew l Snam ALVIN MAYER, F RHINELAN D, MISSOURI.

SPARK-PLUG.

Specification of Letterslatent.

Patented July 1, 1919.

Application led January 2'6, 1918. "Serial No. 213,944.

To all whom t may con'cem:

l Be it known that I, ALVIN MAYEm a citizen of the United States,residing at lRhineland, in the county of Montgomery and State ofMissouri, have invented new and useful Improvements in Spark-Plugs, ofwhich the following is a specification.

This invention relates to spark plugs and it consists in the novelfeatures hereinafter described and claimed.

An object of the invention is to provide a spark plu with a contact ball,and acup shaped soc et member which retains'the ball whereby the ballWill provide a path for the passage of ,current andv will vobviate-l`any corners 0r projections where carbon .may accumulate.

A' :further object of the invention is lto provide in combination withthe ball strucwhereby the current jumps from the ball to the ridge whichwill assure the ignition? of.

tureasjust stated a point which is ro- .vided at its end with aV-shafped ridge V the miXtu'rewhich is presented to the`plug.

In the accompanying drawing Figure 1 is a vertical longitudinalsectional view of the spark plug.

Fig.,2 is an end view of theisame.

Fig. 3 is a detail sectional viewpof an endl portion of the saine.

' j 4The spark plug comprises a body l of porcelain or 'other insulatingmaterial through which a conductor 2 passes. A

f socket 43 lis'carri'exl at the: lower end of the conductor 2, and isprovided atts lowest pointwith an openmg 4, and slits leadingto .thesame. A ball 5 is loosely received in the socket member 3 and may lieover the opento any shaking or jarring action to which the spark plugmay be subjected. A sleeve 6 surrounds the body 1 and carries at itslower end a'point 7 which is disposed transversely under the socketmember 3. The end of the point 7 is provided with-a V-shaped ridge 8whereby tive sharp.

Itis apparent that when the electric current is passed from a point tothe ball or vice versa a spark is produced which will ignite themixture.

.Having described the invention claimed is 4 A spark plug comprising a.body, a conductor passing through the body and 'prowhat is vided with asocket vmember having at its lowest point an opening, a ball freelymovable inthe socket member and adapted to close 'verthe openingtherein, a sleeve surrounding the body and a point carried by the sleeveand disposed transversely with relation to the socket member and belowthe same and spaced from the ball and Socket member. l

In testimony whereof I aiix my signature.

ALVIN MAYER..

the edge of the said point is rela- Y

